Protective helmet



FIG. 1 is a perspective view of a protective helmet incorporating the design of the present invention;

FIG. 2 is a front view of the protective helmet of FIG. 1;

FIG. 3 is a rear view of the protective helmet of FIG. 1;

FIG. 4 is a left side view of the protective helmet of FIG. 1;

FIG. 5 is a right side view of the protective helmet of FIG. 1;

FIG. 6 is a top view of the protective helmet of FIG. 1;

FIG. 7 is a bottom view of the protective helmet of FIG. 1; and,

FIG. 8 is an alternate bottom view of the protective helmet of FIG. 1 in which the internal liner has been removed.

The broken lines shown in the drawings depict portions of the protective helmet that form no part of the claimed design. 

CLAIM The ornamental design for a protective helmet, as shown and described. 